#define LED_Out_Pin 14
#define SW_In_Pin 15
#define VR_In_Pin 32

int VRvalue;
int FlashTime;

void setup()
{
  // Initialize serial port
  Serial.begin(115200);

  // Set pins
  pinMode(LED_Out_Pin, OUTPUT);
  pinMode(SW_In_Pin, INPUT_PULLUP);
}

void loop()
{


  // Reading
  VRvalue = analogRead(VR_In_Pin);

  // Display
  Serial.print("Raw Sensor reading: ");
  Serial.print(VRvalue);
  VRvalue = map(VRvalue, 0, 4095, 0, 100);  // scale it
  Serial.print("\tScaled Sensor reading: ");
  Serial.println(VRvalue);

  // VRvalue = 100 = 3.3V , = 0 = 0V
  // LED flashes from 1Hz to 5Hz by VR value
  // 5 Hz delay is 200ms    1Hz delay is 1000ms
  // map VRvalue 0 -> 100, make FlashTime delay 500ms to 100ms
  // means total delay 1000ms to 200ms when VRvalue 0V -> 3.3V
  FlashTime = map(VRvalue,0,100,500,100); 
  digitalWrite(LED_Out_Pin, HIGH); 
  delay(FlashTime);                     
  digitalWrite(LED_Out_Pin, LOW); 
  delay(FlashTime);
}